Air-compressor.



H. J. BERY.,

MR COMPRESSOR.

APPucATsQN man JULY 31. me.

ssa Patented Mm. 19,1918.v

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HENRY J'. BIERYJ OF DETROIT, MICHIGAN.

AIR-COMPRESSOR.

Specification of Letters Patent.

Application filed July 31, 1916. Serial No. 112,227.

ToaZZ whom t may concern:

Be it Yknown that I, HENRY J. BERY, a citizen of the United States, and residing at Detroit, in the county vof Wayne and State of ,Michigam have invented-a new vand Improved Air-Compressor, of which the following is a specification.

This invention relates to motors and to pumps for conveying liquids and gases and particularly to such pumps as are designed for compressing air and other gases, and its object is to provide -a construction which will be strong and effective, which will have a minimum tendency to wear out of alinement, and which will be self-lubricating.

This invention consists in two vertical alined cylinders, the upper, a workmgcylinder and the lower, a guiding cylinder in which a lubricant is stored, of a pair of alined connected pistons in said cylinders, a crank shaft, intermediate the cylinders, and a connecting rod between the crank shaft and a pin carried by the piston in the guiding cylinder so that the lateral thrust of the connecting rod will be received by the guiding piston which moves in a bath of oil and is therefore susceptible to very little wear.

This invention further consists in so applying the thrust of the connecting rod to the alined pistons that the side stresses on the working piston will be negligible. This invention also consists in so forming the yoke which connects the two pistons that it will intercept all particles of lubricating oil of noticeable size and yet permit the passage of oily mist up to the working piston.

While this construction is particularly adapted to power driven pumps, the prin-k ciple is just as applicable to motors of the trunk-piston type.

In the accompanying drawing, Figure 1 is a view, partly in elevation and partly in section of this improved device. Fig. 2 is a horizontal section through the axis of the crank shaft.

The particular machine shown in the drawing is an air or gas compressor consisting of a base 1 and an electric motor 2 mounted thereon, both shown conventionally. A pedestal 8 supports the shell 4t on which is formed the working cylinder. The inlet valve 6 and-discharge valve '7 may be of any desired construction. A guiding cylinder 8 is connected to the pedestal 3 and is intended to contain an amount of lubricating il, preferably enough to half fill the cyliner. v

A crank shaft 10 is mounted in ball ,be-ar ings 11 carried by the base 1 and the shell 4. The crank 12 has a pin 13 vthat extends through the upper end of the 7'connecting rod. 14. The lower end of this :rodextends down into the guiding piston and receives the wrist pin 15 carried by the piston 16. The working piston -17 may have rings 18 ,and is connected'to the guiding piston bymeans of the yoke 19. It will be noticed in Fig. 2 that there is little space between the side wallsfof the `yoke and the ksides ofthe shell 11, but that thereis more space vbetween the yoke andthe back of the shell and the' cover'20.

While any desired means mayconnect the motor and the shaft 10a pulley-fly-wheelz22 on the shaft 10, a :pulley 23 on the motor shaft, a belt 24 and a tightener 25 are preferred.

The `pistons of motors and pumps usually wear egg-shaped because of the angular stresses from and to the connecting rods. In the present case this is substantially prevented for the lateral thrust and pull of the connecting rod is communicated to the piston 16 which is substantially submerged in oil and lthus liable to very little wear. The lateral stresses on the piston 17 are so small that they need not be considered and nine months of uninterrupted operation of one of these pumps has not worn the piston 17 an appreciable amount.

Vhen the piston 16 goes down into the oil in the cylinder 8, some of this oil will be splashed up and to some extent turned into a mist which will pass up between the upper end of the yoke 19 and the walls of the shell t and settle on the piston 17, keeping it sufficiently lubricated. The splashed up particles will lubricate the crank pin 13, while the wrist pin 15 will usually be submerged at each stroke. It will be understood 4that this invention may be applied to any type of machine having two opposed cylinders and connected pistons.

1. The combination of two vertically opposed cylinders, the upper being a working cylinder and the lower a guiding cylinder, a pair of connected pistons working in said cylinders, a crank shaft extending intermediate said cylinders and a crank and Patented Mar. 1,9, 1918.. l

2 c I Y Y 1,259,593

pin on said crank shaft, a wrist pin mounted in the lower or guiding piston, and a con-V necting rod extendlng between sa1d pinstending through said yoke and having a Copies of this patent may be obtained for crank and crank pin, a connecting rod between the crank-pin and wrist-pin, and a shellinclosing the yoke, and so proportioned as to prevent particles of lubricant from being splashed up onto the working cylinder while permitting a mist of lubricant to passV upward thereto. f

3. The combination of vertically opposed guiding and working cylinders, the latter being above the former, the guiding cylinder being employed to hold lubricant, a working piston in the working cylinder and a tubular guiding piston in the guiding cylinder and connected to the working cylinder, a crank shaft having a crank pin, a wrist pin in the guiding piston, and a connecting rod extending from the crank pinto the wrist pin, alllateralstresses from the connecting rod being transmitted to the guiding cylinder, the action of the guiding piston being to causev a mist of lubricant to pass vup Vinto the working cylinder.

4. The combination of two vertically 0pposed cylinders, the upper being aoworking cylinder and the lower a guiding cylinder,`

hollow pistons in said cylinders, a yoke conneoting the pistons, a crank shaft extending into said yoke, a wrist pin mounted in the'V lower end of the lower piston, a connecting rod vextending, from the crank shaft into the *A lower piston to the wrist pin, all lateral `thrusts of the connecting rod beingr thus conv veyed to the guiding cylinder, and means to revolve the crank shaft.`

5. The combination `of two vertically opposed cylinders, the upper Abeing a working cylinder and the other a guiding cylinder, connected pistons in said cylinders, ya crank shaft, a wrist pin carried by the guiding piston, and a connecting rod-between thev wrist pin and crank shaft, all lateral' stresses of the connecting'rod being thus' conveyed to the guiding cylinder.- Y Y HENRY J; BERY.

verrcents each, byl addressing the Commissioner ot .Patents `Washington, D. C, Y Y 

